When a sudden increase in electrical current occurs form various causes such as lightning strike or damaged power lines or transformers, the power guard detects the extra voltage and safely diverts it to the grounding path. Power guards protect electrical and electronic equipments and their wiring and appliances.
When the correct voltage flows the power guard returns electoral operations to normal. There are three types of power surge protecters in Sri Lanka. There are surge protecter installed between the power lines and the meter in your house or premises. The second type is the power guards installed between the meter and breaker box. The third kind is power guards is the most common in Sri Lankan where it is installed between wall outlets and electronic devices. Voltage spike typically last for 1 to 30 microseconds in Sri Lanka. General electrical spikes reach close to 1,000 volts. Lightning generates more than ten times that. These electrical spikes also destroys electrical wirings, outlets and other connect electrical devices. Long lasting spikes happens when power transformer failures. Most fuses or voltage relays based power guards in sri lanka can not handle these types of power spikes. Some surge protectors and power guards in Sri Lanka sort the current to protect electronic devices using Metal Oxide Varistors or zener-type semiconductors.
Sense most power spikes last for 10s of microseconds, the amount of heat generated by the extra current on wiring is very low, this also enables the routing type power guards in Sri Lanka to operate without any fault, however large spikes generated by lighting or transformer malfunctions creates long spike times which results in melting of grounded power wiring. It is important to not that sometimes power lines and telephone lines are run together in Sri Lanka, in situations like this some times by accident the telephone lines might generate power spikes and effect your electronics such as routers and telephones. Power guards in Sri Lanka commonly display the protection amount by joules. If the power guard has more joules, it is better. This means the power guard can handle large spikes. Most power guard for refrigerator in Sri Lanka carries higher capacity versus power guard for tv. Some power guard for tv in Sri Lanka comes with USB connections. This is to safely charge your mobile device. These usb power guards need at least 2 amps for quicker charging. When choosing a power guard in Sri Lanka choose a one with power strips so you can plug more than one device. Make sure not to plug devices over the amount supported by the power guard. The power guards listed are best spike guard for computer in Sri Lanka. Most hdd drives, ram, cpu, via cards and connected devices gets damaged by energy spikes, AJ power guard in Sri Lanka and Smart Visual power guard in Sri Lanka are one of the best available for for computers and tv’s protection. These power guards also protect electrical pressure runs through wiring when spikes occurs.